Subclassifications Of Assets, Liabilities And Equities [Abstract]
| Concept |
As at 2022-01-29 |
As at 2021-01-31 |
As at 2021-01-30 |
As at 2020-01-26 |
|---|---|---|---|---|
| Subclassifications of assets, liabilities and equities [abstract] | ||||
| Property, plant and equipment [abstract] | ||||
| Property, plant and equipment |
601,100,000
GBP
|
— |
474,800,000
GBP
|
— |
| Intangible assets and goodwill [abstract] | ||||
| Intangible assets and goodwill |
79,300,000
GBP
|
— |
60,500,000
GBP
|
— |
| Investments in subsidiaries, joint ventures and associates reported in separate financial statements [abstract] | ||||
| Investments in subsidiaries, joint ventures and associates reported in separate financial statements |
46,200,000
GBP
|
— |
5,000,000
GBP
|
— |
| Miscellaneous non-current assets [abstract] | ||||
| Non-current net defined benefit asset |
156,900,000
GBP
|
— |
99,200,000
GBP
|
— |
| Trade and other current receivables [abstract] | ||||
| Trade and other current receivables |
1,280,900,000
GBP
|
— |
1,108,100,000
GBP
|
— |
| Classes of current inventories [abstract] | ||||
| Current inventories |
633,000,000
GBP
|
— |
536,900,000
GBP
|
— |
| Classes of current inventories, alternative [abstract] | ||||
| Cash and cash equivalents [abstract] | ||||
| Cash [abstract] | ||||
| Cash |
433,000,000
GBP
|
— |
608,200,000
GBP
|
— |
| Cash and cash equivalents |
199,900,000
GBP
|
514,800,000
GBP
|
514,800,000
GBP
|
52,900,000
GBP
|
| Borrowings [abstract] | ||||
| Current borrowings and current portion of non-current borrowings [abstract] | ||||
| Current borrowings |
233,100,000
GBP
|
— |
93,400,000
GBP
|
— |
| Non-current portion of non-current borrowings, by type [abstract] | ||||
| Non-current portion of non-current bonds issued |
815,700,000
GBP
|
— |
837,000,000
GBP
|
— |
| Current borrowings and current portion of non-current borrowings, by type [abstract] | ||||
| Current bonds issued and current portion of non-current bonds issued |
–
GBP
|
— |
326,000,000
GBP
|
— |
| Trade and other current payables [abstract] | ||||
| Trade and other current payables |
798,400,000
GBP
|
— |
555,300,000
GBP
|
— |
| Miscellaneous non-current liabilities [abstract] | ||||
| Other non-current liabilities |
31,200,000
GBP
|
— |
28,900,000
GBP
|
— |
| Net assets (liabilities) [abstract] | ||||
| Assets |
3,981,800,000
GBP
|
— |
3,758,000,000
GBP
|
— |
| Liabilities |
2,971,800,000
GBP
|
— |
3,097,100,000
GBP
|
— |
| Assets (liabilities) |
1,010,000,000
GBP
|
— |
660,900,000
GBP
|
— |
| Net current assets (liabilities) [abstract] | ||||
| Current assets |
2,407,200,000
GBP
|
— |
2,288,600,000
GBP
|
— |
| Current liabilities |
1,208,100,000
GBP
|
— |
1,196,800,000
GBP
|
— |
| Assets less current liabilities [abstract] |